“The exalted Christ is like a person who stands before the sun and casts a shadow upon earth. Those who look at the shadow can discern in it the contours of the one who made it. Similarly, Hebrews considers Melchizedek to be an earthly shadow that the risen Christ casts back on the page of OT Scripture, and the author will speak about Melchizedek in order to bear witness to the Son of God whom he represents” - Koester